/Engine/Source/Runtime/Engine/Public/SparseVolumeTexture/ISparseVolumeTextureStreamingManager.h
Begins updating the streaming manager. If r.SparseVolumeTexture.Streaming.AsyncThread is 1 and bBlocking is false, most of the updating work is done in another thread.
void BeginAsyncUpdate ( [FRDGBuilder](API\Runtime\RenderCore\FRDGBuilder) & GraphBuilder, bool bBlocking )